248
Recommended BIOS Settings
Chapter 7
AMD-761™ System Controller Software/BIOS Design Guide
24081D—February 2002
Preliminary Information
Registers
-----
Bits
Description
Initialized/
Required
Value
Actual
Value
Key
fcn( )
Notes
0x1x0x0Ch
AGP/PCI Header Type
31:24
Reserved
00h
r
23:16
Header_Type
01h
r
15:8
Pri_Lat_Timer
40h
B
7:0
Reserved
00h
r
0x1x0x18h
AGP/PCI Sub Bus Num/
Secondary Latency Timer
31:24
Secon_Lat_Timer
40h
B
23:16
Sub_Bus_Num
01h
B
15:8
Secon_Bus_Num
01h
B
7:0
Pri_Bus_Num
00h
r
KEY:
B= Mandatory BIOS function
A= AGP setup by BIOS
c = Calculated/set by AMD-761™ internal logic
P= Power management setup by BIOS
o = Setup by OS or OS driver
F = Performance enhancement set by BIOS
r = Hardcoded and reserved
u = PCI operational user interface
E = Elective BIOS function